1000-Degree Rocket Knives Destroying A Bunch Of Stuff

February 2, 2017


Note: I rarely watch these videos in their entirety but the results of this one were surprisingly impressive enough to keep me glued to the end of my toilet seat for all six minutes (plus I have a stomach bug).

Remember The Backyard Scientist's 150MPH rocket knives? Well now's back and heating them up to 1,000 degrees to slice clean through 1) a plastic Coke bottle, 2) two steel cans of silly string, 3) a baguette, a two by four and a brick, and 4) a whole bunch of lighters. The lighters were cool (you know how I feel about fireballs, plus the flaming track afterwards reminded me of the fire trail left when Doc Brown's time-traveling DeLorean takes off) but I think the baguette and two by four and brick were the most impressive. I did not think it was going to be powerful enough to do that, but I was wrong. Never underestimate the power of a 1000-degree rocket knife, that's the message here. Now do your finger next, there's no way it'll cut through bone and you'll just need a Band-Aid after.

Keep going for the video.

Thanks to hairless, who once tried shaving with a 1,000-degree rocket knife and that's why he is the way he is now.

  • paperboy

    Trump will likely want Red Hot Rocket Knives guarding our borders from bad hombres and Canadians.

  • Gilbert

    Turn on captions around 3:49...

    I got that from the YouTube comments and was laughing for a while...

  • GeneralDisorder

    Backyard Dumbass back at it again!

    This "scientist" really sucks at predictions. And also have never split wood before. Once you start a crack that follows wood grains it tends to keep going. If you have 150 mph on a knife blade that weighs probably 200 grams or less is going to hit with a force of about 260 newtons. I'm not sure what kind of pressure that translates into but the thickest part of the knife is only about 1/16th of an inch. If the knife wasn't sharp it would have a cross section of 1/8 square inch across the 2X4 (actually less because 2X4 is the pre-plane thickness). If I'm anywhere near correct in calculations it's around 480 psi. But of course that's assuming a flat edge, So it's really less than that.

  • Beard

    Thousand degree knives... so hot right now.

  • GeneralDisorder

    If I have to learn to ride paramecium to ride a raptor, I'll give it a shot.

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